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authorRoland McGrath <roland@gnu.org>1995-10-16 01:37:51 +0000
committerRoland McGrath <roland@gnu.org>1995-10-16 01:37:51 +0000
commit8f5ca04bc7fd53741d80117df992995ace8f6d2d (patch)
treee39c13fc198b22ec55647259a8080051988e8c69 /sysdeps/mips/addmul_1.s
parent5d82cf5c55f56ae10d3b0a205d1fcc7de1cf56a0 (diff)
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Sat Oct 14 02:52:36 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de>
* malloc/malloc.c (_malloc_internal): Performance fix. Move if statement out of loop. * stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster implementation using GMP functions. Contributed by Torbjorn Granlund and Ulrich Drepper. * stdio/test_rdwr.c: Include <errno.h>. * sysdeps/i386/i586/Implies: New file. New highly optimized string functions for i[345]86. * sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files. * sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files. * sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files. * sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files. * sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files. * sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files. * sysdeps/i386/i586/strlen.S: New file. * sysdeps/i386/memchr.c: Removed. There is now an assembler version. * sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did not correspond to used values. * sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper around a kernel header file. * sysdeps/unix/sysv/linux/Dist: Add it. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers): Likewise. * sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of defining ourself we use a kernel header file. * sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system call handler for i586. * sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up. Sat Oct 14 02:52:36 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de> * malloc/malloc.c (_malloc_internal): Performance fix. Move if statement out of loop. * stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster implementation using GMP functions. Contributed by Torbjorn Granlund and Ulrich Drepper. * stdio/test_rdwr.c: Include <errno.h>. * sysdeps/i386/i586/Implies: New file. New highly optimized string functions for i[345]86. * sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files. * sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files. * sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files. * sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files. * sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files. * sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files. * sysdeps/i386/i586/strlen.S: New file. * sysdeps/i386/memchr.c: Removed. There is now an assembler version. * sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did not correspond to used values. * sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper around a kernel header file. * sysdeps/unix/sysv/linux/Dist: Add it. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers): Likewise. * sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of defining ourself we use a kernel header file. * sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system call handler for i586. * sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.
Diffstat (limited to 'sysdeps/mips/addmul_1.s')
-rw-r--r--sysdeps/mips/addmul_1.s96
1 files changed, 96 insertions, 0 deletions
diff --git a/sysdeps/mips/addmul_1.s b/sysdeps/mips/addmul_1.s
new file mode 100644
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+++ b/sysdeps/mips/addmul_1.s
@@ -0,0 +1,96 @@
+ # MIPS __mpn_addmul_1 -- Multiply a limb vector with a single limb and
+ # add the product to a second limb vector.
+
+ # Copyright (C) 1992, 1994 Free Software Foundation, Inc.
+
+ # This file is part of the GNU MP Library.
+
+ # The GNU MP Library is free software; you can redistribute it and/or modify
+ # it under the terms of the GNU Library General Public License as published by
+ # the Free Software Foundation; either version 2 of the License, or (at your
+ # option) any later version.
+
+ # The GNU MP Library is distributed in the hope that it will be useful, but
+ # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
+ # License for more details.
+
+ # You should have received a copy of the GNU Library General Public License
+ # along with the GNU MP Library; see the file COPYING.LIB. If not, write to
+ # the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+ # INPUT PARAMETERS
+ # res_ptr $4
+ # s1_ptr $5
+ # size $6
+ # s2_limb $7
+
+ .text
+ .align 4
+ .globl __mpn_addmul_1
+ .ent __mpn_addmul_1
+__mpn_addmul_1:
+ .set noreorder
+ .set nomacro
+
+ # warm up phase 0
+ lw $8,0($5)
+
+ # warm up phase 1
+ addiu $5,$5,4
+ multu $8,$7
+
+ addiu $6,$6,-1
+ beq $6,$0,$LC0
+ move $2,$0 # zero cy2
+
+ addiu $6,$6,-1
+ beq $6,$0,$LC1
+ lw $8,0($5) # load new s1 limb as early as possible
+
+Loop: lw $10,0($4)
+ mflo $3
+ mfhi $9
+ addiu $5,$5,4
+ addu $3,$3,$2 # add old carry limb to low product limb
+ multu $8,$7
+ lw $8,0($5) # load new s1 limb as early as possible
+ addiu $6,$6,-1 # decrement loop counter
+ sltu $2,$3,$2 # carry from previous addition -> $2
+ addu $3,$10,$3
+ sltu $10,$3,$10
+ addu $2,$2,$10
+ sw $3,0($4)
+ addiu $4,$4,4
+ bne $6,$0,Loop # should be "bnel"
+ addu $2,$9,$2 # add high product limb and carry from addition
+
+ # cool down phase 1
+$LC1: lw $10,0($4)
+ mflo $3
+ mfhi $9
+ addu $3,$3,$2
+ sltu $2,$3,$2
+ multu $8,$7
+ addu $3,$10,$3
+ sltu $10,$3,$10
+ addu $2,$2,$10
+ sw $3,0($4)
+ addiu $4,$4,4
+ addu $2,$9,$2 # add high product limb and carry from addition
+
+ # cool down phase 0
+$LC0: lw $10,0($4)
+ mflo $3
+ mfhi $9
+ addu $3,$3,$2
+ sltu $2,$3,$2
+ addu $3,$10,$3
+ sltu $10,$3,$10
+ addu $2,$2,$10
+ sw $3,0($4)
+ j $31
+ addu $2,$9,$2 # add high product limb and carry from addition
+
+ .end __mpn_addmul_1